[HBASE-15518] Add Per-Table metrics back

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.3.0, 2.0.0
• Hadoop Flags: Reviewed
• Release Note: Adds per-table metrics aggregated from per-region metrics in region server metrics. New metrics are available under JMX section "Hadoop:service=HBase,name=RegionServer,sub=Tables" and they are available via hadoop metrics2 collectors.
• Assignee: Alicia Ying Shu
• Reporter: Enis Soztutar
• Created: 22/Mar/16 18:48
• Updated: 17/Jun/22 05:35
• Resolved: 20/Apr/16 21:49

Description

We used to have per-table metrics, but it was removed in some restructuring. We have per-region metrics, and per-regionserver metrics, but nothing in between.

For majority of users, per-region is too granular, they are mostly interested in table level aggregates. This is especially useful in multi-tenant cases where a table's disk usage, number of requests, etc can be made much more visible.

In this jira, we'll add the basic infrastructure to add a single (or a few) per-table metrics. Than we can improve on that by adding remaining metrics from the region server level.

The plan is to NOT aggregate per-table metrics at master for now. Just aggregation of per-region metrics at the per-table level for every regionserver.

Issue Links

• is cloned by: HBASE-20240 CLONE - Add Per-Table metrics back
• relates to: HBASE-11062 hbtop